分娩換能器magnetostrictivetra ducer: 磁致伸縮換能器phonotra ducer: 心音換能器piezoelectrictra ducer: 壓電換能器tra ducer: 變送器; 換能器/傳感器; 轉(zhuǎn)換器ultrasonictra ducer: 超聲式傳感器下載手機(jī)詞典可隨時隨地查詞查翻譯